using System.Collections;
using SQLite;

namespace ServiceLib.Common;

public sealed class SQLiteHelper
{
    private static readonly Lazy<SQLiteHelper> _instance = new(() => new());
    public static SQLiteHelper Instance => _instance.Value;
    private readonly string _connstr;
    private SQLiteConnection _db;
    private SQLiteAsyncConnection _dbAsync;
    private readonly string _configDB = "guiNDB.db";

    public SQLiteHelper()
    {
        _connstr = Utils.GetConfigPath(_configDB);
        _db = new SQLiteConnection(_connstr, false);
        _dbAsync = new SQLiteAsyncConnection(_connstr, false);
    }

    public CreateTableResult CreateTable<T>()
    {
        return _db.CreateTable<T>();
    }

    public async Task<int> InsertAllAsync(IEnumerable models)
    {
        return await _dbAsync.InsertAllAsync(models);
    }

    public async Task<int> InsertAsync(object model)
    {
        return await _dbAsync.InsertAsync(model);
    }

    public async Task<int> ReplaceAsync(object model)
    {
        return await _dbAsync.InsertOrReplaceAsync(model);
    }

    public async Task<int> UpdateAsync(object model)
    {
        return await _dbAsync.UpdateAsync(model);
    }

    public async Task<int> UpdateAllAsync(IEnumerable models)
    {
        return await _dbAsync.UpdateAllAsync(models);
    }

    public async Task<int> DeleteAsync(object model)
    {
        return await _dbAsync.DeleteAsync(model);
    }

    public async Task<int> DeleteAllAsync<T>()
    {
        return await _dbAsync.DeleteAllAsync<T>();
    }

    public async Task<int> ExecuteAsync(string sql)
    {
        return await _dbAsync.ExecuteAsync(sql);
    }

    public async Task<List<T>> QueryAsync<T>(string sql) where T : new()
    {
        return await _dbAsync.QueryAsync<T>(sql);
    }

    public AsyncTableQuery<T> TableAsync<T>() where T : new()
    {
        return _dbAsync.Table<T>();
    }

    public async Task DisposeDbConnectionAsync()
    {
        await Task.Factory.StartNew(() =>
        {
            _db?.Close();
            _db?.Dispose();
            _db = null;

            _dbAsync?.GetConnection()?.Close();
            _dbAsync?.GetConnection()?.Dispose();
            _dbAsync = null;
        });
    }
}